Quote Originally Posted by {X}Echo419
really? put your car on a dyno(I know planes aren't powered by their wheels. thanks for the info). for the sake of argument, lets say the speedometer says 100mph. is the car actually going 100mph? NO. it's sitting there with the wheels spinning. now, stick your hand out the window. is there wind shooting over it like if you were on the highway? NO. so what makes you think there will be wind going over the wings of a plane?
But what will the SPEEDO on the plane say!? Zero, that's right. The plane would have no speed. If the plane has no speed, then the conveyor belt has NO speed.